BUG - Not working in release mode

examples/broken.rs

@@ -0,0 +1,29 @@
+//This example puts the timer in PWM mode using the specified pin with a frequency of 100Hz and a duty cycle of 50%.
+#![no_main]
+#![no_std]
+
+use cortex_m_rt::entry;
+use utils::logger::println;
+use hal::gpio::AF6;
+use hal::prelude::*;
+use hal::stm32;
+use stm32g4xx_hal as hal;
+extern crate cortex_m_rt as rt;
+
+#[macro_use]
+mod utils;
+
+#[entry]
+fn main() -> ! {
+    let dp = stm32::Peripherals::take().expect("cannot take peripherals");
+    let mut rcc = dp.RCC.constrain();
+
+    let gpioa = dp.GPIOA.split(&mut rcc);
+    let _pin: stm32g4xx_hal::gpio::gpioa::PA8<stm32g4xx_hal::gpio::Alternate<AF6>> =
+        gpioa.pa8.into_alternate();
+    let mut pin2 = gpioa.pa9.into_pull_up_input();
+    defmt::println!("hej");
+    pin2.is_high().unwrap(); // <--- Booom
+
+    loop {}
+}

src/gpio.rs

@@ -1,8 +1,8 @@
 //! General Purpose Input / Output
 use core::marker::PhantomData;
 
-use crate::rcc::Rcc;
-use crate::stm32::EXTI;
+use crate::rcc::{Enable, Rcc, Reset};
+use crate::stm32::{self, EXTI};
 use crate::syscfg::SysCfg;
 
 /// Default pin mode
@@ -256,8 +256,13 @@ macro_rules! gpio {
             impl GpioExt for $GPIOX {
                 type Parts = Parts;
 
-                fn split(self, rcc: &mut Rcc) -> Parts {
-                    rcc.rb.ahb2enr().modify(|_, w| w.$iopxenr().set_bit());
+                fn split(self, _rcc: &mut Rcc) -> Parts {
+                    unsafe {
+                        let rcc_ptr =  &(*stm32::RCC::ptr());
+                        $GPIOX::enable(rcc_ptr);
+                        $GPIOX::reset(rcc_ptr);
+                    };
+
                     Parts {
                         $(
                             $pxi: $PXi { _mode: PhantomData },